a-d. Hbegff/f and Hbegf△ILC3 mice were challenged with 3% DSS for 6 days (n=6 individual mice). The functional ability of intestinal epithelium was analyzed, including anti-microbial peptides production (a), tight junction proteins expression (b), stem cell composition (c) and proliferative ability (d) (N=4 individual mice per group, n=27 crypts quantified per group). e. Schematic model of chronic colitis induction. Data in a-d are representative of two independent experiments, shown as the means ± S.E.M. Statistics are calculated by unpaired two-tailed Student’s t-test. Scale bars=50 μm.